Chair arm



FIG. 1 is an inside, rear perspective view of a chair arm embodying my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is an inside elevational view thereof;

FIG. 6 is an outside elevational view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a chair arm, as shown. 